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VEX5 Series
3 Port Solenoid Valves / Precautions 2
Be sure to read before handling
Mounting
Warning
1. Operation Manual (this copy)
Install the products and operate them only after reading the
operation manual carefully and understanding its contents.
Also, keep the manual where it can be referred to as necessary.
2. Ensure sufficient space for maintenance activities.
When installing the products, allow access for maintenance
and inspection.
3. Tighten threads with the proper tightening torque.
When installing the products, follow the listed torque specifications.
4. If air leakage increases or equipment does not
operate properly, stop operation.
Check mounting conditions when air and power supplies are
connected. Initial function and leakage tests should be performed
after installation.
5. Painting and coating
Warnings or specifications printed on or affixed to the product
should not be erased, removed, or covered up.
Please consult with SMC before applying paint to resinous
parts, as this may have an adverse effect due to the solvent
in the paint.
Piping
Caution
1. Preparation before piping
Before piping is connected, it should be thoroughly blown out
with air (flushing) or washed to remove chips, cutting oil, and
other debris from inside the pipe.
2. Winding of sealant tape
When screwing piping or fittings
into ports, ensure that chips from
the pipe threads or sealing material
do not enter the piping.
Also, if sealant tape is used, leave
1 thread ridge exposed at the end
of the threads.
3. Connection of piping and fittings
For a fitting with sealant R or NPT, first, tighten it by hand,
then use a suitable wrench to tighten the hexagonal portion of
the body an additional two or three turns. For the tightening
torque, refer to the table below.
When using a fitting other than an SMC fitting, follow the
instructions given by the fitting manufacturer.
4. Piping to products
When connecting piping to the product, refer to the catalogue
to avoid mistakes in the position of the supply port, etc.
Caution
1. Polarity
For a solenoid valve with DC type light / surge voltage
suppressor, check the polarity when connecting.
If a mistake is made regarding the polarity, damage may
occur to the diode in the valve, the switching element in the
control device, power supply equipment, etc.
2. Applied voltage
When electric power is connected to a solenoid valve, be
careful to apply the proper voltage. Improper voltage may
cause malfunction or coil damage.
3. Check the connections.
Check if the connections are correct after completing all
wiring.
Warning
1. The valve has been lubricated for life by the factory and does
not require any further lubrication.
2. If a lubricant is used in the system, use class 1 turbine oil (no
additives), ISO VG32. For details about lubricant manufacturers'
brands, refer to the SMC website. Additionally, please contact
SMC for details about class 2 turbine oil (with additives) ISO
VG32.
Once lubricant is utilized within the system, since the original
lubricant applied within the product during manufacturing will
be washed away, please continue to supply lubrication to the
system. Without continued lubrication, malfunctions could occur.
If turbine oil is used, refer to the Safety Data Sheet (SDS) of
the oil.
Warning
1. Type of fluids
Please consult with SMC when using the product inapplications
other than compressed air.
2. When there is a large amount of drainage
Compressed air containing a large amount of drainage can
cause the malfunction of pneumatic equipment. An air dryer
or water separator should be installed upstream from filters.
3. Drain flushing
If condensation in the drain bowl is not emptied on a regular
basis, the bowl will overflow. This may cause the malfunction
of pneumatic equipment.
If the drain bowl is difficult to check and remove, the installation
of a drain bowl with an auto drain option is recommended.
For compressed air quality, refer to the SMC Best Pneumatics
No. 6 catalog.
4. Use clean air.
Do not use compressed air that contains chemicals, synthetic
oils that include organic solvents, salt, corrosive gases, etc.,
as it can cause damage or malfunction.
- 5 -
Wiring
Lubrication
Air Supply
No.VEX∗∗∗∗-OMA0019-C
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